The 1958 calendar was a good calendar but this is what I would have done if I was in charge for F1.
1958 F1 Calendar - My suggested Calendar (Original):
15th June
British Grand Prix
29th June
Portuguese Grand Prix
13th July
Monaco Grand Prix
27th July
French Grand Prix
10th August
Belgian Grand Prix
24th August
Dutch Grand Prix
7th September
German Grand Prix
21st September
Italian Grand Prix
5th October
Moroccan Grand Prix
19th October
Argentine Grand Prix